SoundWave Sound Amplifying Car Mount for iPhone 4/4SGive your GPS, podcasts, and phone calls a sound boost. The built-in amplification system doubles the volume coming from your phone speaker, making it easier to hear your turn-by-turn directions, calls and more. The cradle mounts in seconds to the windshield or vent and holds your phone securely, even on the roughest terrain. For Use With: iPhone® 4/4S; OEM/Compatible: Compatible.
Manufacturer's limited two-year warranty.